Packer for working barrels



Patented Nov. 20, 1928.

UNITED STATES' PATRICK I-I. BRAY, 01E HUNTINGTON BEACH, CALIFORNIA.

PACKER FOR WORKING BARRELS.

Application filed November 1, 1926. Serial No. 145,579.

This invention relates to packing means for pumps having relatively reciprocating palrts, such as a plunger and its working barre I am well aware that it has been proposed to effect a tight packing of the working con tact between the barrel and the plunger by providing a stack of split rings upon a core part having its outer surface provided with a conical portion whereby to cause the rings to expand as they tend to shift toward the larger part of said conical portion. I make no claim for this conical ring-spreading device, but do claim a'novel assembly of a number of sections having conical parts and which sections are each units adapted to be screwed one to the other.

The invention has for one object to provide plunger body sections adapted to be attached one to the other so that no inner supporting pipe is required for the plunger body. The advantage here gained is that a maximum flow passage is obtained through a packer of given size by reason of the elimination of the inner carrying pipe; the body sections of my invention being self-carrying when connected end to end.

I have found that when soft packing is used in plungers of the type here concerned the packing tends to fray or feather off and work in between the body rims and the barrel. An object is to provide means to so support the ends of the ring stack that this feathering and crowding in will be eliminated.

And, additionally, an object is to provide for the automatic expanding action of the soft packing at each end of the stack during operating of the moving pump part.

Other objects and advantages will be made manifest in the following specification of an embodiment of apparatus of the invention; it being understood that modifications, variations and adaptations may be resorted to within the scope of the invention claimed.

Figure 1 is a longitudinal section of the improved packing device.

Figure 2 is a section, axially, of one body unit.

Figure 3 is a plan of a split-ring, soft packing member.

Figure 4 is a plan of a non-metallic, hard ring. p

In the present disclosure a working barrel I. carries a stack of packing rings R of a kind B surrounds a plunger which includes a plusofter than hard fiber split-rings F which are disposed at each end of the stack.

According to my invention, each unit A hasa threaded socket end 2 and an externally threaded top or stem end 3, the one being complementary to the other so that a number of the units maybe connected endwise, as in Fig. 1.

The enlarged socket end 2 runs free, or' clear, in the barrel B and has a top shoulder 4 from which extends a slightly converging part 5 merging into a cylindrical area 6. l/Vhile the cylindrical part might directly extend to the stem 3, I prefer that it join with a reverse conical part 7, that is, reversely inclined as to the part 5 so that a stack of rings B, when tending to shift endwise either way on the unit, will have its endmost rings expanded outward to the barrel.

The end 8 has a narrow rim 8 presenting a shoulder 9 to its near conical part 7. Since the metal rim 8 and the socket 2 run slightly spaced from the barrel the soft packing material R tends to feather off into the clearance gap and I prevent this by providing hard fiber rings F which bear on the shoulders 4 and 9 and run snug on the barrel and so keep the soft packing from crowding into the clearance.

Any suitablenumber of the packer bearing units A may be combined to build up a plung- .er body and the latter may have any suitable cylindrical body member having a uniform diameter flow passage from end to end and each being threaded for attachment of coordinate members; the outer surface of the body being turned down and presenting an elongated packing recess between integral shoulders, the bottom of the recess including a straight cylindrical portion and shallow eX- panding conical faces at the ends of the cylindrical portion, and an elongated stack of packing rings seating on the bottom of the recess each end of the packing being expanded as it shifts in one direction on the conical faces as the load of liquid pressure is taken by the packing.

PATRTOK H. BRAY. 

